Hazardous ions uptake behavior of thermally activated steel-making slag

Jha, Vinay Kumar; Kameshima, Yoshikazu; Nakajima, Akira; Okada, Kiyoshi

doi:10.1016/j.jhazmat.2004.08.004

Cited by 55 publications

(27 citation statements)

References 20 publications

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“…Those studies have reported that total P concentrations ranged from 0.7 to 17 mass percent as P2O5 in various types of Slags. 1,5,34) These values, which correspond to 98-2 400 μmol P g -1 , are consistent with those observed in this study. We determined the chemical composition of the Slag samples by energydispersive X-ray fluorescence spectrometry as well ( Table 3) and found that total P concentrations in the Slag samples estimated by the ignition method and X-ray fluorescence were comparable.…”

Section: Total P Concentrationsupporting

confidence: 92%

Fractionation of Phosphorus in Steelmaking Slags and Aquatic Particulate Materials Using a Sequential Extraction Technique

2015

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We measured the concentrations and chemical forms of phosphorus (P), an essential nutrient in marine ecosystems, in steelmaking slag (Slag) to determine whether use of Slags as a basal medium for artificial tidal flats and seagrass beds was an environmentally acceptable option for the reuse and recycling of Slags. We tested six Slag samples, including dephosphorization slags and converter slags. The total P concentrations were one order of magnitude higher in the Slags than in the aquatic particulate materials. We used a sequential extraction technique in which the strength of the extractants was increased stepwise in order to separate the P pools in the Slags into four fractions; exchangeable P, Fe (III)-bound P, authigenic P-like component, and detrital P-like component. We considered P contained in the first two fractions to be easily mobilized under the conditions found in some marine environments, such as the highly reduced zones of subsurface sediments. The mobile P accounted for 55-660 μmol P g -1 and for 56-81% of the total P in the Slags. The results strongly suggested that Slags have substantial potential to function as a P source that could sustain biological productivity in artificial tidal flat and seagrass bed ecosystems. On the other hand, Slags also have the potential to mitigate intense and rapid release of P from basal media, because mechanisms exist for adsorption and co-precipitation of phosphate with major components of Slags, including iron, calcium, and magnesium.

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Section: Total P Concentrationsupporting

confidence: 92%

Fractionation of Phosphorus in Steelmaking Slags and Aquatic Particulate Materials Using a Sequential Extraction Technique

2015

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“…The capability of various materials for simultaneous sorption of ammonium and phosphate ions [6,[12][13][14][15] is summarized in Fig. 10.…”

Section: Simultaneous Sorption Of Ammonium and Phosphate Ionsmentioning

confidence: 99%

Simultaneous uptake of ammonium and phosphate ions by compounds prepared from paper sludge ash

Okada¹,

Ono²,

Kameshima³

et al. 2007

Journal of Hazardous Materials

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“…The calculated NH 4 þ uptake of the F3K7-500 sample should be equal to 1.73 mmol g À1 , which is less than the experimental NH 4 þ uptake (2.34 mmol g À1 ). This can be explained by the enhancement of sorption of NH 4 þ ions by oxides and suppression of the pH change due to the formation of calcium phosphates (Okada et al, 2007a;Wajima and Rakovan, 2013;Jha et al, 2004).…”

Section: Endomentioning

confidence: 99%

Ion uptake properties of low-cost inorganic sorption materials in the CaO–Al2O3–SiO2 system prepared from phosphogypsum and kaolin

Kadirova

Hojamberdiev

et al. 2014

Journal of Cleaner Production

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Hazardous ions uptake behavior of thermally activated steel-making slag

Cited by 55 publications

References 20 publications

Fractionation of Phosphorus in Steelmaking Slags and Aquatic Particulate Materials Using a Sequential Extraction Technique

Fractionation of Phosphorus in Steelmaking Slags and Aquatic Particulate Materials Using a Sequential Extraction Technique

Simultaneous uptake of ammonium and phosphate ions by compounds prepared from paper sludge ash

Ion uptake properties of low-cost inorganic sorption materials in the CaO–Al2O3–SiO2 system prepared from phosphogypsum and kaolin

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